Quasi-periodic Oscillations and Constraints on the Neutron Star Mass and Radius in the Low-mass X-ray Binary 4U 0614+091

Details Quasi-periodic Oscillations and Constraints on the Neutron Star Mass and Radius in the Low-mass X-ray Binary 4U 0614+091 Quasi-periodic Oscillations and Constraints on the Neutron Star Mass and Radius in the Low-mass X-ray Binary 4U 0614+091

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...18911302k&link_type=abstract

American Astronomical Society, 189th AAS Meeting, #113.02; Bulletin of the American Astronomical Society, Vol. 28, p.1425

Astronomy and Astrophysics

Astronomy

Scientific paper

We have detected quasi-periodic oscillations (QPOs) near 1 kHz from the low mass X-ray binary 4U 0614+091 in observations with XTE. The observations span several months and sample the source over a large range of X-ray luminosity. At high count rates, two high frequency QPOs are detected simultaneously. The difference of their frequency centroids is consistent with 323 Hz in all observations. This suggests the system has a stable `clock' which is most likely the neutron star with spin period 3.1 msec. Thus, our observations provide evidence for millisecond pulsars within low-mass X-ray binary systems and reveal the `missing-link' between millisecond radiopulsars and the late stages of binary evolution in low mass X-ray binaries. We suggest that the kinematics of the magnetospheric beat-frequency model applies to these QPOs: the higher frequency QPO is associated with the Keplerian frequency of the inner accretion disk and the lower frequency QPO is the `beat' signal arising from differential rotation of the inner disk and the spinning neutron star. Assuming the high frequency QPO is a Keplerian orbital frequency, we find a maximum mass of 1.9 Msun and a maximum radius of 17 km for the neutron star.

Affiliated with

Also associated with

No associations

Rating

Quasi-periodic Oscillations and Constraints on the Neutron Star Mass and Radius in the Low-mass X-ray Binary 4U 0614+091 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Quasi-periodic Oscillations and Constraints on the Neutron Star Mass and Radius in the Low-mass X-ray Binary 4U 0614+091, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quasi-periodic Oscillations and Constraints on the Neutron Star Mass and Radius in the Low-mass X-ray Binary 4U 0614+091 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-818419